What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 11.03°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

51.9

°F

May 14, 13:03

Trend:

stable

Yesterday:

51.9°F

Tomorrow:

52.0°F

Sunrise:

05:21

Sunset:

21:09

Day Length:

15 h. 48 min.

Holyhead in May

Minimum:

47.9°F

Average:

49.2°F

Maximum:

50.4°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 51.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.8°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 53.5°F on 2025, while the historical minimum was 49.3°F on 2018.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 52.4°F, with minimum temperature starting at 52.0°F, while the maximum might reach 52.8°F.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Apr 30	50.9°F	50.6°F	49.4°F
May 1	51.2°F	51.2°F	49.6°F
May 2	50.7°F	51.8°F	49.6°F
May 3	50.7°F	51.5°F	49.6°F
May 4	51.0°F	51.5°F	49.8°F
May 5	51.4°F	51.7°F	50.1°F
May 6	51.2°F	51.9°F	50.1°F
May 7	51.0°F	51.5°F	50.2°F
May 8	51.3°F	52.4°F	50.3°F
May 9	51.7°F	52.2°F	50.6°F
May 10	51.6°F	52.0°F	50.5°F
May 11	51.7°F	52.0°F	50.5°F
May 12	51.9°F	52.3°F	50.8°F
May 13	51.9°F	52.9°F	51.1°F
May 14	51.9°F	53.5°F	51.1°F
May 15	52.0°F	53.5°F	51.2°F
May 16	52.2°F	53.4°F	51.4°F
May 17	52.2°F	53.6°F	51.4°F
May 18	52.4°F	53.8°F	51.6°F
May 19	52.4°F	53.8°F	51.6°F
May 20	52.7°F	54.2°F	51.9°F
May 21	52.8°F	53.6°F	52.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.5°F in Winter, 48.7°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	53.5°F	19mi
Bangor	52.9°F	21mi
Conwy	53.6°F	33mi
Douglas	51.4°F	59mi
Aberystwyth	54.7°F	66mi

* current water temperature in this city

** straight line distance from Holyhead